Clamp for dental molds



FIG. 1

l `Dec. 6, 1927.

W. J.- CLARK ET AL CLAMP FOR DENTAL MOLDS 5 4f wml] I @M .llvl/EA/TORS Walter J. Clark William M. Roy/:ne

A TTORNEY.

WALTER JgcLfAnx Ann WILLIAM YAPATPIIIT OFFICE.

MVROMINE, or WICHITA, KANSAS. e leLArfIIrv FO'RDEN'I'AL MoLDs.

v,Application 4led May 6,

v Ourinvention relates tal molds.

-The object of our invention is to provide a clamp for dental molds, that is quick in op- 5 eration, positive in its work, and one that applies pressure to themolds evenly@ p A further object ofy our inventionis to provide a clamping 'means -having a lever by which theeccentric or ycam is operated and functions as a handle, the said handle being removable when the clamp is placed in thevulcanizing chamber. These and other objects will be :more fully explained. 1g Referring to the drawings:

to ya clamp for" den-1 hereinafter Fig. 1 is a lfrontviewvk 'of the clamp, with the flasks shown in .dottedlines Fig. 2 is aside view of Fig. 1.

is a planview of Fig. 1.

Fig-.4 is the same View as Fig. 2, with .one of the'legs of the clamphbroken ofl' for convenience of illustration.

Fig. 5 is a sectional View of the clamping portion' of the clamp, taken along the line V-V in Fig. 3.

The clamp is composedA of a plate 1, having upwardly projecting ears 2, said ears provided with slots 3 to receive a screw 4:

which is screwed through the legs 5 and 6,

said screw acting-as a retaining 'member to hold the plate 1 between the legs 5 and `6..

The legs 5Vand 6 are integral with a base member 7. l

Integral with the plate 1 are four studs 8 projecting upwardly. On the plate 1 is a boss 9, through which an aperturek 10 is drilled, and threaded to receive the screw 11. The form of plate'12 is shown'in Figs.

4 and 5, the said plateis providedwith ap- 40 ertures through which pass the studs 8 as guiding means therefor, and =in the center is an aperture to receive the screw 11. Between the plates 1 and 12 and on each of the studs 8 are spiral springs 13 which tension the plates apart andthe said screw 11 acts as an adjustment to gauge theV maximum.

separation of the two plates 1 and 12. The rod 14 has its bearings in the upper ends of the legs 5 and 6, and on this rod is a cam 0 shaped member lrliaving an integral pro-Y jection 16 which is socketed as shown at 17 for the purpose of receiving an actuating rod 18 having a right angle bend as shown in Figs. 2 and 4.- The object of the bend 1n this rod is that when the clamp is in its com-- pressed posit-ion, the rodl functions as a haniea?. seria1 Nol 189,410.

afterwhich the rod may Jberemoved 'inor-r der that the container' may be sealed vfor heating purpose to vulcanizev the rubber within the flasks. `The said rod 18 will preferably be used with the straight end, (seedottedlines 18X), inserted inthe socket 17 for .purposes of manipulating` the clampl while the bent end ofthe rodwwill only be used as a handle 'as above described.

lVhen the clamp Vispositioned asshown in Fig. 4, the plate 1 will rest on the -topof the molds 19, 20 and 21. f The cam 15 pressing down on 'the plate 12 engages thesprings 13 between the two plates 12 and 1 the re i sult of which is that the spring pressure is equally applied to the top'of the flasks at'A the four points as shown by the studs 8. e DuringA the process of vulcanizing, fthe rubber in the molds moves to iinbed itself715i into the forms of the flasks, by which means the flask ma be opened slightly asshown by the dotte lines 22, or should the flask be slightly open the pressure imposed thereon will cause it to close. Thel springs 13 compensate for this movement and always hold a pressure on thefrubber while it is being vulcanized. Vhen the clamp and flasks are to be removed from the vulcanizing chamber, the rod 18 is inserted in t-he opening 17 as heretofore described, functioning as a handle by which the heated flask may be removed.

Such modifications, may be employed as lie within the scope of the appended claims. Having thus described our invention, what we claim as newv and desire to secure by Letters Patent is 1. a. clamp for dental molds, abase member having upwardly extending legs diametrically positioned thereto, an aperture in the upper ends of the legs, a plate having two slotted ears peripherally positioned, screws threadedly engagingl through the legs and loosely engaging in the slots of the ears as pendent supporting means for the plate, a second plate positioned on the first said plate, springs between said plates, means to prevent said plates from separating, a rod trunnioned in' the apertures ofthe legs, a cam like members mounted on said rod to engage on last said plate as compression means therefor to function as a clamp.

k2. In a clamp for dental molds, a base member having upwardly extending legs peripheraliy and diametrically positioned, dental flasks positioned on the base member being means for the rod.

3. In a `clamp lor dental molds, a mechanism of the kind described, haring a base. member with diametrieally positioned legis as a receiver for a plurality oit dental tennis, a plate to engage on the top of the tori'ns having studs distributed and laterally1 ere tending therefrom, spi ai springs positioned on the studs, a second plate haring apertures to engage on the studs, a serein` centrali)Y positioned to loosely engage through an aperture in the last said plate and threadedly engage in the first said plate as means to ho d said plates in Contact, a rotatable cam member mounted on a rod, trunnioned in the upper ends ol the legs. a socketed member integrally connected to the cam member, and

o a lever having a right angle bend to engage in the socket so that when the cam is rocked to engagement the lever functions as a handle for carrying the mechanism.

4. In a clamp tor dental molds, a base member having' a pair of legs peripheral and diametrically i positioned and laterally extending` therefrom, an aperture in the upper end of each of the legs, a plate havin" a stud positioned on the four corners and Taterally extending trom 'the plane thereof, a spiral spring positioned on each ot the studs, a second plate having apertures in the `corners thereof to slidably engage on the studs and restingr on the springs, a screw centrally positionedand th eadedly engaging in thefirst said plate, and an aperture in registry therewith in the last said plat-e so that the head of the screw will engage on the top of the plate as means to prevent separation of said plates, a rod t-runnioned in the apertures ot the legs, a cam member on the rod as compression means for the plates, a detachable handle for the cam member as actuating means therefor, all as, and for the purpose described.

In testimony Whereofvwe aix our signatures.

WALTER J. CLARK. WILLIAM M. ROMINE. 

